Biology:Nitrite reductase (NAD(P)H)
| nitrite reductase [NAD(P)H] | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||
| EC number | 1.7.1.4 | ||||||||
| CAS number | 9029-29-2 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
| Gene Ontology | AmiGO / QuickGO | ||||||||
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In enzymology, a nitrite reductase [NAD(P)H] (EC 1.7.1.4) is an enzyme that catalyzes the chemical reaction
- ammonium hydroxide + 3 NAD(P)+ + H2O [math]\displaystyle{ \rightleftharpoons }[/math] nitrite + 3 NAD(P)H + 3 H+
The 4 substrates of this enzyme are ammonium hydroxide, NAD+, NADP+, and H2O, whereas its 4 products are nitrite, NADH, NADPH, and H+.
This enzyme belongs to the family of oxidoreductases, specifically those acting on other nitrogenous compounds as donors with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is ammonium-hydroxide:NAD(P)+ oxidoreductase. Other names in common use include nitrite reductase (reduced nicotinamide adenine dinucleotide, (phosphate)), NADH-nitrite oxidoreductase, NADPH-nitrite reductase, assimilatory nitrite reductase, nitrite reductase [NAD(P)H2], and NAD(P)H2:nitrite oxidoreductase. This enzyme participates in nitrogen metabolism. It has 3 cofactors: FAD, Iron, and Siroheme.
Structural studies
As of late 2007, only one structure has been solved for this class of enzymes, with the PDB accession code 2JO6.
References
- "Electron-spin-resonance studies of the NADH-dependent nitrite reductase from Escherichia coli K12". Biochem. J. 207 (2): 333–9. 1982. doi:10.1042/bj2070333. PMID 6297458.
- Lazzarini RA; Atkinson DE (1961). "A triphosphopyridine nucleotide-specific nitrite reductase from Escherichia coli". J. Biol. Chem. 236 (12): 3330–3335. doi:10.1016/S0021-9258(18)94019-6. PMID 14463130.
- "A nitrite reductase from Neurospora crassa". Biochim. Biophys. Acta 37 (3): 468–76. 1960. doi:10.1016/0006-3002(60)90503-5. PMID 14426899.
- Ann. Acad. Sci. Fenn. Ser. A II 60 (1955) 200.
- "Functional dissection and site-directed mutagenesis of the structural gene for NAD(P)H-nitrite reductase in Neurospora crassa". J. Biol. Chem. 271 (39): 24096–104. 1996. doi:10.1074/jbc.271.39.24096. PMID 8798648.
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